/*******************************************************************************
 * Copyright (c) 2012, 2013 IBM Corporation and others.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/

package org.eclipse.jdt.internal.ui.text.java;

import org.eclipse.core.runtime.Assert;
import org.eclipse.core.runtime.IPath;
import org.eclipse.core.runtime.Path;
import org.eclipse.jdt.core.CompletionProposal;
import org.eclipse.jdt.core.IJavaElement;
import org.eclipse.jdt.core.IJavaProject;
import org.eclipse.jdt.core.JavaModelException;

public class PackageProposalInfo extends ProposalInfo {

    private boolean fJavaElementResolved = false;

    private final IJavaProject fJavaProject;

    private final CompletionProposal fProposal;

    PackageProposalInfo(IJavaProject project, CompletionProposal proposal) {
        Assert.isNotNull(project);
        Assert.isNotNull(proposal);
        fJavaProject = project;
        fProposal = proposal;
    }

    @Override
    public IJavaElement getJavaElement() throws JavaModelException {
        if (!fJavaElementResolved) {
            fJavaElementResolved = true;
            fElement = resolvePackage();
        }
        return fElement;
    }

    /**
     * Resolves to a PackageFragment.
     *
     * @return the <code>IPackageFragment</code> or <code>null</code> if no Java element can be found
     * @throws org.eclipse.jdt.core.JavaModelException thrown if the given path is <code>null</code> or absolute
     * @since 3.9
     */
    private IJavaElement resolvePackage() throws JavaModelException {
        char[] signature = fProposal.getDeclarationSignature();
        if (signature != null) {
            String typeName = String.valueOf(signature);
            typeName = typeName.replace('.', IPath.SEPARATOR);
            return fJavaProject.findElement(new Path(typeName));
		}
		return null;
	}
}
